Vertebrata - Sauropterygia - Polycotylidae

Full reference: K. Carpenter. 1996. A review of short-necked plesiosaurs of the Western Interior, North America. Neues Jahrbuch fur Geologie und Palaontologie, Abhandlungen 201(2):259-287

Parent taxon: Polycotylidae according to R. B. J. Benson and P. S. Druckenmiller 2013

Sister taxa: Ceraunosaurus, Dolichorhynchops, Edgarosaurus, Eopolycotylus, Georgiasaurus, Manemergus, Pahasapasaurus, Palmulainae, Palmulasaurinae, Palmulasaurus, Piratosaurus, Polycotyilnae, Polycotylinae, Sulcusuchus, Thililua, Trinacromerum

Subtaxa: Plesiopleurodon wellesi

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Type: Plesiopleurodon wellesi

Ecology: aquatic carnivore